Routing machine



Oct. 24, 1939.

H. A. SEDELMEYER ET AL 2,177,347

ROUTING MACHINE Filed Aug. 19, 1938 4 Sheets-Sheet 1 INVENTORS HERMAN A.SEDELM EYER EDWARD A.MELDRUM 1939. H. A. SEDELMEYER ET AL 2,177,347

ROUTING MACHINE Filed Aug. 19, 1938 4 Sheets-Sheet 2 gigs.

INVENTORS HERMAN A.SEDELM EYER EDWARD A.MELDRUM sv gm ATTORNEYS 1939. H. A. SEDELMEYER ET AL 2,177,347

ROUTING MACHINE' Filed Aug. 19, 1938 4 Sheets-Sheet 5 INVENTORS HERMAN A. SEDELM EYER 6 EDWARD A.MELDRUM max-W ATTORNEYS O 1939. H. A. SEDELMEYER -r AL 2,177,347

ROUTING MACHINE Filed Aug. 19, 1938 4 Sheets-Sheet 4 6'7 I a? o 88 6 67 L 91 v 90 8.9 J7 I 46 49 6 ji.f'f V in. I J7? 93 91 4f- 5 J0 G 44 I I It? INVENTORS HERMAN A. SEDELMEYER EDWARD A. MELDRUM BY 0.9 BMW ATTORNEYS Patented Oct. 24, 1939 UNITED STATES PATENT OFFIQE Herman A. Sedelmeyer, Ross, and Edward A. Meldrum, Menlo Park, Calif.

Application August 19, 1938, Serial No. 225,732

2 Claims.

(Granted under the act of March 3, 1883, as

amended April '30,

This application is made under the act of March 3, 1883, as amended by the act of April 30, 1928, and the invention herein described and claimed, if patented, may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment to us of any royalty thereon. I We hereby dedicate the invention herein described to the free use of the People in the territory of the United States to take eifect on the granting of a patent to us.

This invention relates to a machine for constructing relief maps. 7

One of the objects of this invention is the pro vision of a machine of the type mentioned which makes it possible to construct from a two dimensional contourmap, a relief map out of a precast block of'material, such as plaster of Paris, obviating the necessity of first building .up a negative form of laminated sections and casting the relief map from such form.

The following description, considered together with the accompanying drawings, will disclose this invention more fully, its arrangements, constructions, and operations of parts, and further objects and advantages will be apparent.

In the drawings:

. Figure 1 is a side elevational view;

Figure 2 is an end elevational view; and

Figure 3 is a plan view of an illustrative embodiment of this invention.

Figure 4 is an enlarged plan view of the tracing table.

Figure 5 is an enlarged detail of the router as- 35 sembly, partly in section.

Figure 6 is a perspective View of the pantograph assembly.

Figure '7 is an elevational view of the upper part of the machine showing the manner in which 40 the pantograph assembly is attached to the pedestal.

Figure 8 is an enlarged elevational view of the motor and the means employed for attaching it at the top of the pedestal.

Referring with more particularity to the drawings, in which like numerals designate like parts, a pedestal Ill consisting of an upright frame is mounted on a heavy base plate II and supports a semi-circular tracing table l2 and a routing table I3, substantially as shown. The tracing table I2 is disposed on radially mounted horizontal L-beams l4, l5 and I 5, which beams are secured together at the top of a vertical bracket l7. Web plates l8, l9, and support the said beams on the bracket ll, substantially as shown.

The bracket I1 is adjustably mounted on a vertical channel 2! by means of the vertical slots 22, 22 in the bracket [1, and the bolts 23, 23 tapped through the channel 2 i, said channel being secured to the pedestal I0. A projecting shoulder 24 offsets the top of the channel 2| so that it is in a truly vertical position.

The routing table I3 is supported on a screw threaded ram 25 engaging the threaded end 25 of a pipe stanchion 21, which stanchion is fixed to the base ll. Vertical plate guides 28, 28 28 are provided to brace the table l3 to the angles 2?, 3H, and 3|, which angles are secured to a vertical dovetailed beam 32. Said beam is slidably mounted in a vertical channel 33 fixed to the side of the pedestal Hi to guide the routing table in its vertical movements. A bevel gear '34 fixed coaxially to the ram 25 meshes with the bevel gear 35fixed to the horizontal shaft 35. Said shaft 36 is mounted in a pipe bearing 31 fixedly mounted on a bracket 38 suspended from the routing table 13. A wheel 39 is fixed to the outer end of the shaft 35 and carries a handle 40 for manually imparting rotation to the bevel gear 35 through the shaft 36. A pointer 4! projects from aconvenient point on the routing table l3 and slides with the vertical movements of said routing table over a vertically disposed scale 42 attached to the pedestal Ill.

The shaft 36 is provided with a locking device 42 of any desired type. The type shown in the drawing is merely suggestive and is of the simple vise-type, well-known in the art.

At the top of the pedestal I3, above the tables l2 and I3, two arms 43 and 44, of equal length,

are pivotally mounted on a common shaft 45, the pivoted end of the arm 44 serving as a bearing for the forked bearings 45 and 47 of the arm 43, both of which are mounted on the shaft 45 between the pedestal bearings 48 and 49, substantially as shown. The other ends of each of said arms 43 and 44 terminate to form a bearing 53 and 5|, respectively, upon which arms 52 and 53 are pivotally secured, respectively, between their ends. Said arms 52 and 53 are also pivotally secured together at one of each of their ends, the arm 52 carying a bearing 55 which is straddled by the bifurcated end of the arm 53, a pinconnection 55 holding the two ends together pivotally, the connecting pin 56 of the bearing is extended upward to which is secured two sheaves 51 and 58.

The arm 53 is extended to receive a tracing assembly, which assembly is simply composed of a vertical rod 59 slidably mounted through a sleeve bracket and adjustably secured therein by means of a set-screw 9|. The lower part of the rod 59 carries-a tracing point 62 removably secured to said rod by means of a simple ratcheted jaw vise assembly 63, such as that employed by ordinary drilling braces.

correspondingly, the extended end of the arm 52 carries a router assembly, shown in detail in Figure 5. This assembly consists of a body in three attached sections, namely, the upper section 64, middle section 65, and lower section 65 vertically secured to said arm 52. A shaft 61 is rotatably mounted through said body. Recessed collar bearings 68 and B9 are provided to hold rod 61 in a fixed vertical relation with respect to the body member. The rod 61 extends a short distance above the upper section 64 to which is secured a sheave 10. The rod 61 also projects a substantial distance below the lower section 66 and carries a ratcheted jaw Vise assembly 1 l similar to the one employed on the tracing assembly hereinabove described, and it is adapted to removably secure a router point 12. This router 'point'is designed to carve the precast material of which the relief map is to be made. The relative position of this material is shown in place in Fig ure 1 and is designated by the numeral l3. This material is held in place on the routing table by means of four angles 14, 15, 15 and T. adjustably mounted on said routing table by means of the slots i8, 19, 89 and 8| and the bolt-nut assemblies 82, 83, 84 and 85, all respectively.

The routing point is actuated by rotation of the shaft 5'! which rotation is accomplished by two belt connections to a motor 86 preferably electric mounted on top of the pedestal H] by means of brackets 81, 81, 87, secured to a clamping ring 83 encircling the housing of said motor. One of these two belts 89 connects the sheave 79 with the sheave 51, and the other belt 90 connects the sheave 58 with a sheave 9| attached to the powered shaft 92 of said motor.

To dispose of dust and particles created by the router point in cutting the material l3,'a suction arrangement is provided consisting of an annular inverted channel 93 disposed around the assembly H, by means of a bracket 94. This channel is connected to a vacuum machine 95 mounted on the base ll through a flexible hose 96, connected with a plurality of lead pipes 9'l communicating with said channel 93, as shown in Figure 1.

The operation of this invention is as follows: The precast block of plaster board or other suitable material 73 is securely clamped on the routing table I3 by means of the angles l4, (5%, l6 and TI. A topographical map (not shown) of the relief surface desired is secured on top of the tracing table l2. The motor'86 is then started and the tracer point 62 is guided along the contour lines of the topographical map, the routing table l3 being elevationally adjusted for corresponding elevations of the contour map by rotating the wheel 39. The scale ratios are easily adjusted by means of the pointer 4| and the scale 42. Any step-like formation may be overcome by finishing and filling the carved material with modeling clay.

Having thus described our invention, we claim:

1. A machine for fabricating relief maps comprising a Vertical support, a pantograph assembly on said support, said assembly consisting of two short lever arms co-hinged on said support, two co-hinged longer lever arms, each pivoted to one of said short arms, a tracing pointer carried at the end of one of said longer arms, a rotatably actuatable routing tool assembly including a pulley for actuating the tool on the end of the other longer arm, a prime mover bracketed on said support above the common pivot of said short arms, the power takeoff of said prime mover having a pulley concentric with the common pivot of said short arms, two coactable idling pulleys rotatably mounted at the pivot point of the lever carrying said routing tool and its corresponding short lever arm, a belt connecting the pulley of said prime mover to one of said idling pulleys, another belt connecting the other idling pulley to the pulley of said routing tool assembly, two tables adjustably disposed on opposite sides of said support, one table being adapted 'to support a topographic map, and the other table being adapted to support material for fabricating the relief map, a scale vertically secured to said support, and a pointer fixed to said last mentioned table movable over said scale whereby said last mentioned table may be elevationally adjusted in correspondence to selected contours of the topographic map on said first mentioned table.

2. In a routing machine of the type mentioned having two tables adjustably disposed on opposite sides of a vertical support, a pantograph assembly over said tables, said assembly consisting of two short lever arms co-hinged on said support, two co-hinged longer lever arms, each pivoted to one of said short arms, a tracing pointer carried at the end of one of said longer arms, a, rotatably actuatable routing tool assembly including a pulley for actuating the tool on the end of the other longer arm, a prime mover bracketed on said support above the common pivot of said short arms, the power takeofi' of said prime mover having a pulley concentric with the common pivot of said short arms, two co-actable idling pulleys rotatably mounted at the pivot point of the lever carrying said routing tool and its corresponding short lever arm, a belt connecting the pulley of said prime mover to one of said idling pulleys, and another belt connecting the other idling pulley to the pulley of said routing tool assembly.

HERMAN A. SEDELMEYER. EDWARD A. MELDRUM. 

